Swab-cup.



0.1. POORE 6L S. T. PEARSONS.

SWAB CUP.

APPLICATION FILED SEPT. 2e. 1916.

1.2292 35 B a Patented June 5, 1917.

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@NEED STATES PATENT @FFQE CLARENCE J. POORE AND SAMUEL T. PEARSONS, OF RUTLAND, VERMONT, ASSIGNORS T0 B. M. JONES & CO., INC., OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

SWAB-CUP.

Application filed September 26, 1916.

T0 all whom it may concern:

Be it known that we, CLARENCE J. PooRn and SAMUEL T. PEARsoNs, citizens of the United States, residing at Rutland, in the county of Rutland and State of Vermont, have invented certain new and useful Improvements in Swab-Cups; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to swab cups, and especially to that type of swab cup adapted for use in conjunction with a reciprocating rod such as a piston rod, valve stem, or the like; and has for an object to provide new and improved means for distributing a lubricant upon such reciprocating rod, and at the same time wipe off from the rod the accumulated dust before the rod enters the gland, and thereby prevent cutting out the gland and packing material.

A further object of the invention is to provide in conjunction with a gland a chamber with a ring located within the chamber surrounding and embracing the reciprocat-l ing rod, having a furrowl formed upon the inner or contacting surface of the ring, with means for supplying alubricant to the fur row within such housing.

A further object of the invention is to provide a housing in conjunction with a gland and a lubricant-distributing member withinthe housing, with means provided so that any blow from the gland will pass about the distributing member and out 0f the housing without passing between the distributing member and the rod to thereby displace the lubricant.

A further object of the invention is to provide a swab ring in separable sections which, when combined, will surround and embrace a reciprocating rod, and providing improved means for holding such completed ring in engagement and embracing the rod, with improved housing for maintaining the ring in position. j

With these and other objects in view the invention comprises certain novel features of construction, combination and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawings .Figure 1 is a View 0f the improved swab Specification of Letters Patent.

Patented J une 5, 1917.

Serial No. 122,320.

cup o f the external type shown in front elevation, certain parts of the housing being broken away and the rod being shown in transverse section.

Fig. 2 is a diametrical sectional View through the swab cup as indicated by line 2 2 of Fig. l, and also showing arrow l as the position of Fig. 1.

Fig. 3 is a view partly in top plan and partly in section, the housing being broken away and part of the swab ring being broken away.

Fig. 4 is a view in front elevation of the swab ring assembled, parts being broken' away to show the furrows and connections.

Fig. 5 is a perspective view of the adjacent ends of the swab ring sections shown from the external periphery.

Fig. 6 is a perspective view of the adjacent ends of the swab ring sections shown from the internal periphery.

Fig. 7 is a view of the spring tension member.

Fig. 8 is a view of the swab cup in front elevation, certain parts being broken away, such embodiment being of the internal type.

Fig. 9 is a diametrical sectional view taken on line 9 9 of Fig. 8, and showing arrow 8 as the position of Fig. 8.

Fig. 10 is a view partly in top plan and partly in section of the swab ring used in the internal type.

Figs. l1. and 12 are dierent views of the tension spring.

Like characters of reference designate corresponding parts throughout the several views.

The swab cup which forms the subjectmatter of this application discloses in the so-called external type a housing 2O adapted to be secured to the exterior of a gland by inserting the regular compression bolt of the gland through the openings 21 formed through the flange 22 extending outwardly beyond the outer periphery of the housing 20, so that the rear wall of the housing shown at 23, in Figs. 2 and 3, is directly in contact with the gland shown at 24: at Fig. 2. l

The housing and the flange 22 are preferably formed in sections and secured together by means of bolts 25, so that the housing may be put together to embrace the rod 26 without removing the rod from the cylinder, valve hOllSng, or the like, or disconnecting it from the cross rods or other connecting member.

Within the housing the swab ring islocated, composed of the sections 27 and 28, having a continuous groove or furrow 29 formed entirely about in the sections 27 and 28 in the surface contacting with the rod 26. One of the sections, as 27, is also provided with a nipple 30, having a conduit 31 forming communication between the furrow 29 and the source of lubricant supply as the conventional oil cup 32. Y The lower segment of the swab ring shown at 28 is provided at its opposite extremities with a socket 33, while the upper member as 27 is provided with al lug 34 at each of its extremities of smaller transverse area than the socket '38 to produce a loose t as indicated at Figs. 1, 3 and 4, the lug 34 entering socketV 38 and providing means to carry the lubricant across the space between the separated ends of the segment and thusprevent the lubricant being carried therefrom by the moving rod 26.

To hold the sections 27 and 28 in proper operative relation and in engagement with the rod 26 with the proper tension, spring 85 is employed having loops 86 at its opposite ends, such spring being passed about the exterior of the swab ring within the furrow 37, and while under tension the loops 36 slipped over the nipple 30 by which the spring is retained under tension, thereby clamping the segments of the ring in yielding engagement with the periphery of the rod 26.

t will be noted especially fromv Figs. 2 and 3 that the dimension of the swab ring on a line parallel with the axis of the rod 26 is less than the width of the housing 20. The reason for providing the looseness just referred tois that if there should be any blow from the cylinder or valve housing, it would pass within the housing 2O and about the swab ring and out from the housing around the rod through the insets 20 of the segments without being forced between the rod and the Vswab ring, and thereby dislocating and displacing the lubricant carried in the furrow 29. Y y

Instead of employing a housing separate and ldistinct from the gland to produce what is called the external type and which is the preferable type to apply to a structure already installed, an internal type is employed which is formed as part of the gland organiration'. This type is shown at Figs. 8V to 12 i'nclusive,-wherein the gland is shown at 88,

chamber 39 being formed vtherein with Ya cover-plate 40 separated along the line 42, 1 and provided with a boss 43 fitting into the chamber 39 and Vall secured in kposition by the regular gland bolts 44inserted through the openings 45 in thefplate 40; With this arrangement the chamber 39 issubstantially equiiv'alent to the housing 20, and a swab ring is located therein substantially the equivalent of theV swab ring shown at Figs. 1 and 2. In view of the fact, however, that the gland 28 cannot be separated to permit the introduction of the swab ring, the nipple 8O is replaced by a short piece ofV tubing 46 insertible into the opening 47 in the swab ring segment 48, and secured therein in any approved manner as by a bolt 49. The lower swabV ring segment is substantially identical withv the segment 28 shown at Figs. 1 and 2,'and is similarly numbered.

For supplying tension tothe segments shown at Figs. 8 and 9, a spring 49 is employedY which differs from the spring 35 only in the manner of connection, a double keyhole shaped loop 5() being employed in the Ypresent instance with an eye 51 at the opposite end of the spring which is adapted to hook into the end of the loop 50 after the spring has been passed about the segments 28 and 48 in such position that the opening in the loop 50 is exactly over the opening 47 and placed in position heforethe nipple k46 is inserted into lsuch opening 47. In the drawings, Figs. 8 and 9, no means of applying lubricant to the tube 46 is shown, it being understood that .the means shown at Figs. 1 and 2, or any other usual and ordinary means maybe employed. ln assembling the internal type shown at Figs. 8 and 9, the segments 28 Vand'48 are first placed about the rod 26, and the spring 49 passed about such segment with the opening of the loop 50 over the opening 47. rl`he assembled segments Iare 'then moved slidably along the rod 26 until positioned within the housing Y 89, when the tube 46 is inserted into position as shown at Figs. 8 and 9, and secured therein by the bolt 49.y The cover-plate 40 is now placed about the rod-and moved so that boss V43 is in position inthe chamber, and tho gland bolts 44 inserted int-o position toexert pressure upon such plate and upon the gland member.V Space for the escape of blow fromv the gland is provided in the internal type in the same manner and with the same efiect as in the externaltype. Y y

The segmental swab rings alsov serve to prevent the introduction of dirt or other extraneous matter into the cylinder or valve chest or theV introduction of air when the engine is drifting by closing tightly against the inner wall of the housing land gripping the -rod as described.

Whatis claimed as new 'isz-.-

1. A swab ring composed of an upper semi-circular member with a grooved 'inner upper member when the members are assembled upon a rod, and means for yieldably securing the members in coperative position.

2. A swab cup comprising in combination with a reciprocating rod, a` chamber embracing the rod, a swab ring embracing the rod and located within the chamber and being free to move a limited distance in the direction of the axis of the rod, said swab ring being provided with a continuous furrow in its contacting surface, and means connected to the ring to introduce a lubricant to the furrow.

3. A swab cup embodying a chamber, a swab ring located in the chamber and provided with limited movement in all directions therein, said swab ring being composed of seO'ments having registering furrows formed in their inner peripheries, a tension member engaging the external periphery of the segment, and means to introduce a lubricant to the furrow.

4. The combination with a reciprocating rod, of a swab ring embracing the rod and provided with a continuous furrow in its contacting surface entirely surrounding the rod and having a radial duct, means to introduce a lubricant in the furrow through said duct, and means positioning the swab ring. for permitting limited movement in all directions.

5. The combination with a. gland, of a chamber formed adjacent to the gland, a reciprocating rod mounted within the gland and chamber, a swab ring located within the chamber and embracing the rod, said swab ring being of less dimension longitudinally of the rod than the corresponding dimension of the chamber, and means connected to the ring for introducing a lubricant between the swab ring and the rod.

6. A swab cup comprising a swab ring constructed in interengaging segments positioned to surround a rod, a spring embracing the exterior of the segments and holding the segments in yielding engagement with the rod, and means to restrain movement of the ring with the rod.

7. A swab cup comprising a. chamber, and

a swab ring adapted to snugly fit a reciprocating member therein, said ring being limited in its movements with the rod and having blow ports or recesses providing for relief of pressure from the running joint of the ring and member.

8. A swab cup comprising a. chamber, in which may reciprocate a rod, a swab ring snugly tting said rod and having a. lubricant duct on its inner surface, and means connected to said ring and projecting through said chamber for supplying lubricant to said duct.

9. A swab for pistons or other reciprocating elements, comprising an internally peripherally furrowed ring having a laterally extending receiving portion at one side.

10. A swab forpistons or other reciprocating elements, comprising an internally peripherally furrowed segmental ring having a laterally extending receiving portion at one side, and means for yieldingly holding the segments in assembled relation.

11. A swab for pistons or other reciprocating elements, comprising an internally peripherally furrowed segmental ring having a laterally extending receiving portion at' one side, and resilient means for yieldingly holding the segments in assembled relation.

12. A swab cup for a. reciprocating element, comprising a chamber in which said element may reciprocate, and an internally grooved ring tting said element and having a nipple extending upwardly through the casing.

13. A swab cup for a reciprocating element, comprising a chamber in which said clement may reciprocate, and an internally grooved, substantially continuous ring fitting said element and having a nipple extending upwardly through the casing.

In testimony whereof, I aifix my signature in the presence of two witnesses.

CLARENCE J. POORE.

Witnesses:

O. ELIZABETH SMALL, R. NEWELL.

In testimony whereof I atlix my signature.

SAMUEL T. PEARSONS.

Copies of this patent may be obtained for rive cents each, by addressing the Commissioner of Patents, Washington, D. C. 

